At What Point is the Needle Damaging Records?


I have used my Denon 110 between 1-5 hours a day for the past three and a half years, and lately I noticed the highs are beginning to sound a little muted. Could I damage my records by not replacing the cartridge right away?
jmoog08
Here are a couple of links to those old stylus microscopes some dealers had in the 70s. Mcintosh dealers had to buy a lot of gear back then. The Wild Heerbrug was $4000 back then. That's about $17,000 in today's dollars. Audio Classics said theirs cost them $6800 dollars. I can't find what the Shure microscope cost back then. Links.[http://www.roger-russell.com/phono.htm] [http://www.shure.com/idc/groups/tech_pubs/@global_managed/documents/webcontent/us_pro_sek-2_ug.pdf]
I guess their system doesn't like it.[http://www.shure.com/idc/groups/tech_pubs/@global_managed/documents/webcontent/us_pro_sek-2_ug.pdf] If you want, copy and paste might work if this doesn't.

http://www.shure.com/idc/groups/tech_pubs/@global_managed/documents/webcontent/us_pro_sek-2_ug.pdf
I'm sorry. Google "Shure phono cartridge microscope". The SEK-2 is one of them. C/PEK-3 the other.
Stylus microscopes - while it's always nice to have a specially designed, dedicated professional tool for a job, it's a classic mistake to assume that having nothing is the only option if you can't have the fancy one.

Some magnification is better than none. I've got a little 8X printer's loupe that lets me see all kinds of things I can't with the naked eye and I doubt it cost $15.

Same story with sound level meters. Depending on the specific abilities, calibrated meters start at hundreds of dollars and quickly go much higher. Yet the $50 Radio Shack model can be extremely useful to the home listener.